Automatic gun.



PATENTED SEPT. l1, 1906.

No. 830,511Q

H. LEHMANN. AUTUMATIG GUN APPLIUAHON FILED www, 1905.

IY@ l.

Fig. ,2.

, Mwwmll 'PA'lENT/ED SEPT. l1, 1906.

H. LEHMANN. AUTOMATIC GUN APPLIGATIQN FILED AUG. 24, 1905.

2 SHEETS-SHEET 2.

J. a 1 F FIG.17.

FIG. l1.

MAG DEB HRG-BUC KA U, (i ERM .f1 N Y.

AUTGMATiC GUN.

Specifttion of Letters Patent.

Patented Sept. 1 1, 1006.

Application tiled August 24,1905. Sbrial No. 975.533.

To all whom, it muy conserve:

Beit knovm that-1, HEnMANN Lum-mnh?, c subject of the King of' Prussia, Germani Einperor, and u resident of Magdeburg, Kingdom of Prussia, Empire of Gernuiny, have invented certain new und useful lmprovelneots in Automatic Guns, of-whieh the followingr is a, s iecificotion.

"i`his invention has for its object to iinprove automatic firearms or guns-that is, those guns in which all the displacements of the separate arts for cooking thc firingiin, opening the. recoit, cjecting the eertri fvecases, inserting the cartridges, closing t e breech, and firing the `gun are autolrintltgell),4v ellected, sonic of the im rovcnients being also applicable toguns w lich are not 'automati. l

The accompanyinv drawings show' an nu tomatic gun provided with a recoiling barrel, altholwh it is to be understood that any other part which operate-s automatically upon {iring may be substituted therefor.

Figure 1 is a longitudinal section through the breech after tiring, but with the breech still closed, Fig. .2 is a simile" sectionshow- 'ing the breech open and the firing-pin cocked.

Figs. 3 and 4`are horizontal longitudinal sections'. Fi 5 is a cross-section throngh'the breech. igs. 6 to l0 show in longitudinal section and on a larger seele the breech-block removed from the gun. Figs. 11 to 13 show in sectional elevation, plan, and longitudinal section o modification of the locking-bolt for the breech-block. Figs. 14, 15, and 16 show the barrel extension in longitudinal section, rear elevation, und plan; and Figs. 17 to 2U represent the. firing mechanism.

The gun-barrel 2, connected with the bnrrel extension 17 is guided in the front wall of the gun-casing 3 and nlso'by two guide and 'stop angl'ti-pieees 4 find is guided at the rem' by projections 5, arranged upon th:l borrel extension (see Figs. v14, 15, 16) and which eugage witlrcorresponding guide-strips G of the casing 3. 'lhfforward movement ol the hmrel after recoil is effected by thev spring-7 in the known manner. f

The iirin -pin 1t) is nrrnnved in the bore of the breechlock S and is subject to the iniluence ofthe springr 9, (see Fi s. 1, 2 and (i to 11), the forward movement of t iis pin being limited by the breech-block head 1]. Upon the :tile 1L the tiro sears -MlirinLf-seur 13 und :iu-

tonmtie senr 15x-nre rotntnblj,` mounted, the 55 former hein;r octusrted by the trigger 1 The. senr H retains the firing-.pin 10, which is melted before the beginninpY of the return movement of the breech-block und is held in this position until the breech again locked. on

Then, hut not till thon, the scar 14 csnlie nutonnttienlh' released by the finger 16 on the angular lever 17, pivot-cd on the breechbloek, und as seid lever is not actuated by hand it therefor-efprevents premature release of the firing-pin.

The locking means comprises n4 lockingbolt 1S, slidahly arranged on the rear part of the breech-block 8 in u Tuidc transverse of the axis of the barrel. this bolt engage in corresponding lateral locking-recesses 20, Figs. 14 and 15, of the borrel Vextension 1 when the breech is locked; but

when the breech-block is released they are able to travel with this latter in the plurality of guidc-grooves21 on each Sideof the breechblock in the said barrel extension. ln order to avoid e one-sided straining of the. lockingbolt, the recesses 2U and the projections 1Q are symmetrically arranged on opposite sides 8o of the breech-bolt. Further, the projections are rearwardly inclined from their bases, the recesses being likewise inclined to conform to the shape of the projections.

The slide i212, Figs. 1 and 2, which is dis- 85 placeable in the guides 23 of the casing 3, is held by the spring 37 in its forward position, as represented in Fig. 1. T he link 24 eonnects it with the swinging levers 25, which,

together with the hand-lever 26,. are iix'ed go upon the pini?, which is rotatably mounted in the easing. The rollers 29 are mounted upon the pins 28 on the Sides of the barrel extension, Fig. 3, and these rollers in the recoil of the lmrrel press against the widened Tie projections 19 of 7o Although tie gunnoo hen the side 22 |05 thus moves hack, (its projection 30 engag- I ing in the breech-block 8 and; its rojection 31 in the firing-pin 10 and the said) slide displacing the angular lever 17, mounted in the reech-bolt,) in the first place the firing-pin is actuated by the rejection 31 and cocked, so that the noses o the two sears 413 and 14- are able to come in front of a corresponding seft on the firing-pin; In the meantime the right-hand face of the* slot 32 in the slide comesagainst the lever 17 and displacesit in such a manner that itde resses the locking-bolt 18. The path for t e recoil of the breech-block is then free. The left-hand face of the pro'ection30 now strikes against the correspon ing -face of the recess in the breech-block and draws this -latter back into the position shown in Fig. 2. Space is therefore provided for the ejection of the empt cartridge-case and the introduction of a fresh cartridge.

In Fi s. 11, 12, and 13 a modifed arran ement o the locking-bolt is illustrated. n this case itis arranged behind the breechblock head. It embraces thefbreech-block and u on the unlocking of the breech is displace not downward, as previously, but upward. When, after firing, the next cartridge has been broughtv in front othe breech-block, the slide is again drawn forward by the spring 37. The left-hand face of the slot 32 then presses against the lever 17, and as this latter is now prevented from rotating by the locking-bolt 18, 'thaprojections 19 of which slidein` the longitudinal grooves 21, it carries the whole breech-piston and the cartridge'forward. When the breech-block head l 11 strikes against the b arrel or against the base of the cartridge, the osition of the projections. 19 -correspon s with the position -of the transverse grooves 20. The breech-block will thereore remainV stationary,durin g the` further displacement of theslidesl The locking-bolt 18 is, however, raised by the an ular-lever into the `position` represented in ig. 1 and the breech-blockis thereby locked. The rejection 31 of the slide 22 permits the ringin 10 to slide forward to such an extent t at the sears 13 and 14 bear a ainsttheir seat onythe iirin pin. In the atter part of its movement t e slide has rotated the angularflever to such an extent that the fingenl on the same bears` against the projection 33 of the sear`=`14 (see Fig. 17) and turns the latter until it releases the ringin,.whih up to then it had held. The said bolt is now only keptcocked by the ringsear 13, which is adapted to beactuatedby 'fhand. Single firing may now be effected movement og thev breech-b ook. The firingpin is then only acted upon by the scar la. Owin to the fact that each time the breechis loc ed the sear .14 is automatically relelased by the fin er '16 of the lever 17, automatic iiring of t e gun may be effected by a constant pressure upon the trigger 15.

` In addition to the sears the projection 31 on the slide also prevents the uncocking of' the firing-pin durinnr the rearward and forward movement of the breech-block, because during the whole of this ytime its left-hand face' presses against the corresponding face of the notch or recess in the firingin. Only during the locking does sufiicient reedom or playexist between these two faces to permit the firing-pin to spring forward.

The bolt 35, which connects the side walls of the case.one with the other likewise limits the swing of the intermediate lever 34. The spring 36-tends to rotate this lever in a righthanded direction. l

As has already been stated in the introduction hereto, the recoiling' barrel may be replaced by the action of a gas-pressure piston, which forces back the lever 25 in any suitable manner.

Having now described my invention, what I claim as new is 1. In an automatic gun, ,the combination with a part moving automatically upon firing and a breech-block, of a swinging lever moved by said part in one direction, a slid-e contiolli'ng the openi and closin movements of the breechxlock, mova )le and mounted inde endently of' the breech-block and operated the swinging lever, and a sprin moving t e slide in the other direction.

2. n an automatic gun, the combination with apart moving automatically upon firing, and a breech-block, ofA a swinging lever moved' by said part in one direction, a slide movable and mounted independently of the breech-block, controllin the-opening and closing ofthe breech-bloc and operated by the swin ing lever, a link connecting the swinging ever and the slide, and a spring moving the slide in the other direction.

3. In an automatic gun, the combination of the swinging lever operated b a part moving automatically upon firing, a reech-block,

locking means for the block, and a slide movable and mounted independent] of the breech-block and connected with t e swinging lever and to the breech-block for transmltting motion to lock and unlock the block. 4. In an automatic gun, the combination with the barrel ofl the swinging lever onerated by a :part moving automatically upon firing, a breech-block, ocking means-for the breech-block, and a slide mountedindepend: ently of the breech-block, connected with .the swinging'lever and transmitt' motion to lock and unlock the breech-b ook, and to move the breech-bleek` I to and from. the

breech of the barrel.

IOO

necte 5. The combination with the breech-block and 'a slide mounted independently of the breech-block and operated automatically upon the firing of the gun, of a locking means carried by the breech-block, and an anglelever ivoted to the breech-block and ccn- (l, to the locking means and to the slide to. cause a locking and unlocking of the breech-block.

6 The combination of the frame, thc swinging lever pivoted to the frame, a recoiling barrel for causing the swinging of the lever, a slide mounted on the frame and connected to the lever to be operated by the sameJ a breech-block, and locking means for the breech-block controlled by the slide.

. 7. The combination with the frame, the

yrecoiling-barrel extension, a breech-block carried thereby, and movable thereon, and locking means for the breech-block, of a slide mounted on the frame independently of the breech-block, a pair of swinging levers, one arranged on each side ofthe barrel extension, pivoted' to the frame, and engaged by the sai extension to be moved thereby, connection between said swinging levers and the y slide,:\and connection between the slide and sion, pivoted to the frame and block the breech-block-loeking means to cause a lookin and unlocking of the breech-block.

8.* e combination With the frame, the recoiling-barrel extension, and `a breechcarried thereby and movable thereon, of a slide mounted on the frame above the breech-block, va pair of` swinging levers, one arranged en each side of the barrel extenengaged by said extension to be moved thereby, connection between the levers and the slide, and connection between the slide and the breechblock for causing the movement of the breechblock on the barrelextension. Y

9. InA an automatic, gun, the combination with the frame, the barrel extension, and a breech-bolt movableithereon, of a pair of levers-pvoted to the frame on opposite sides of the barrelextension and operated by a part movable automatically upon firing' and a slide monnted independently of the breechblock and connected with the breech-block and with the levers.

10. In a gun, the combination with the breech-block, of a barrel extension provided with guide-grooveswon opposite sides and lateral recesses leadingfinto the` grooves, said recesses extending rearwardly, and locking projections carried on opposite sides of the breech-bl( ck extend i ng re arw ardl y from their able thereon, a plurality of guides for the breech-block on each side thereof, and a plurality of projections on each side of the locking-holt, movable to and from the uidesyto cause the locking of the breech-bloc 12. The combination with a breech-block, of guides on which the breech-block travels located on each side of the breech-block, and a locking-.bolt having a plurality of projections for each guide; said guides being provided With lateral recesses into which the projections move to lock the block.

13. In a gun, vthe combination with the breech-block, and a barrel extension havin uide-grooves on each side for the breechiilock and lateral locking-recesses, of a vertically-sliding locking-bolt carried by the breech-block and provided with projections on opposite sides movable in the lateral locking-recesses to lock the bolt and into the guide-grooves to permit the breech-block to move.

14. In an automatic gun, the combination With a slide moved in one direction automaticall f upon the firing of the gun,-oi' a breechblocli, a locking means carried by the breechblock, a tiring-pin, an automatic sear, and an angle-lever operated b the slide, controlling the locking means, an operating the scar.

15. In an automatic with a, part moving automatically upon firing, and the breech-block carrying-a firingpin, of a swinging lever moved by the automatically-moving part, a slide movable upon the frame of the gun, a spring moving the slide in one direction, a link connecting the slideand the swinging lever, a locking-bolt carried by the breech-block, an an le-lever ivoted on the breech-block contro ing the ockingl-bolt and engaged b projection carried by the s ide engaging the firing-pin to cock it, and engaging the breechblock to move it to and from firing position.

The foregoing speciiicati'on signed this 9th day of August, 1905.

, HERMANN LEHMANN. In presence of-- n WILHELM FLEIscHnAon, MARIA SCHNEIDER.

gun, the combination the slide, and a- 

